slmgr /ipk <setup key>
slmgr -skms
slmgr -ato
| Windows 10 Pro | W269N-WFGWX-YVC9B-4J6C9-T83GX |
| Operating system edition | KMS Client Setup Key |
|---|---|
| Windows Server 2012 R2 Server Standard | D2N9P-3P6X9-2R39C-7RTCD-MDVJX |
| Windows Server 2012 R2 Datacenter | W3GGN-FT8W3-Y4M27-J84CP-Q3VJ9 |
| Windows Server 2012 R2 Essentials | KNC87-3J2TX-XB4WP-VCPJV-M4FWM |
| Windows 7 Professional | FJ82H-XT6CR-J8D7P-XQJJ2-GPDD4 |
Source: https://docs.microsoft.com/en-us/windows-server/get-started/kmsclientkeys